Multiple Choice
In the context of resistors and Ohm's law, which quantities are related by the equation ?
27. Resistors & DC Circuits
Resistors and Ohm's Law
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A resistor has a current through it of 5 A. If the EMF across the resistor is 10 V, what is the resistance of this resistor?
A
2 Ω
B
50 Ω
C
0.2 Ω
D
5 Ω
Verified step by step guidance1
Identify the given values: the current (I) through the resistor is 5 A, and the electromotive force (EMF or voltage, V) across the resistor is 10 V.
Recall Ohm's Law, which relates voltage (V), current (I), and resistance (R) in a circuit: V = I * R.
Rearrange Ohm's Law to solve for resistance (R): R = V / I.
Substitute the given values into the rearranged formula: R = 10 V / 5 A.
Calculate the resistance using the formula: R = 10 / 5, which simplifies to R = 2 Ω.
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